package com.lv.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.lv.common.CustomException;
import com.lv.common.R;
import com.lv.dto.DishDto;
import com.lv.mapper.DishMapper;
import com.lv.pojo.Dish;
import com.lv.pojo.DishFlavor;
import com.lv.service.DishFlavorService;
import com.lv.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;

import java.util.List;
import java.util.stream.Collectors;

/**
 * @Author:晓风残月Lx
 * @Date: 2022/5/3 16:22
 */
@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;
    /**
     * 新增菜品，同时保存对应的口味数据
     * @param dishDto
     */
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        // 保存菜品基本信息到菜品表dish
        this.save(dishDto);
        // 对应菜品id
        Long dishId = dishDto.getId();
        // 菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors=flavors.stream().map((item) ->{
           item.setDishId(dishId);
           return item;
        }).collect(Collectors.toList());

        // 保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */

    public DishDto getByIdWithFlavor(Long id) {
        // 查询菜品基本信息
        Dish dish = this.getById(id);

        DishDto dishDto=new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        //查询当前菜品对应的口味信息
        LambdaQueryWrapper<DishFlavor> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

    /**
     * 更新菜品信息，同时更新对应的口味信息
     * @param dishDto
     */
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        // 更新菜品信息
        this.updateById(dishDto);
        // 更新口味表
        // 清理当前菜品对应口味数据
        LambdaQueryWrapper<DishFlavor> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());

        dishFlavorService.remove(queryWrapper);
        // 添加当前提交过来的口味数据
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors=flavors.stream().map((item)->{
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());
        dishFlavorService.saveBatch(flavors);

    }

    /**
     * 删除菜品信息，同时删除对应的口味信息
     * @param ids
     */
    @Transactional
    public void removeWithFlavor(List<Long> ids) {

        //构造条件查询器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //先查询该菜品是否在售卖，如果是则抛出业务异常
        queryWrapper.in(ids!=null,Dish::getId,ids);
        List<Dish> list = this.list(queryWrapper);
        for (Dish dish : list) {
            Integer status = dish.getStatus();
            //如果不是在售卖,则可以删除
            if (status == 0){
                this.removeById(dish.getId());
                LambdaQueryWrapper<DishFlavor> flavorLambdaQueryWrapper=new LambdaQueryWrapper<>();
                flavorLambdaQueryWrapper.eq(DishFlavor::getDishId,dish.getId());
                dishFlavorService.remove(flavorLambdaQueryWrapper);
            }else {
                //此时应该回滚,因为可能前面的删除了，但是后面的是正在售卖
                throw new CustomException("删除菜品中有正在售卖菜品,无法全部删除");
            }
        }
        
    }

    /**
     * 对菜品进行启售或停售
     * @param status
     * @param ids
     */

    public void updateStatus(Integer status, List<Long> ids) {
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.in(ids != null,Dish::getId,ids);
        // 批量数据进行批量查询
        List<Dish> list = this.list(queryWrapper);

        for (Dish dish : list) {
            if(dish!=null){
                dish.setStatus(status);
                this.updateById(dish);
            }
        }


    }


}
